#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<assert.h>
char* my_strcat(char* des  , const char* sur)
{
	
	char* ret = des;
	assert(des != NULL && sur != NULL);
	while(*des!='\0')
	{
		des++;
	}
	while((* des++ = *sur++))
	{
		;
	}
	return ret;
}
int main()
{
	char arr1[] = "hello ";
	char arr2[] = "bit!";
	printf("%s\n",my_strcat(arr1,arr2));
	return 0;
}

